Participating date: April 6, 2022

Schedule: 1:00 – 1:20 PM / 4:00 PM – 4:20 PM

 

General Description: Surface-enhanced Raman scattering (SERS) spectroscopy is an experimental technique in which the electric field associated to surface plasmons, or collective oscillations of surface electrons on a metal, amplify the Raman signature of a trace analyte by orders of magnitude when compared to the conventional Raman spectra, thus allowing for the detection of the analyte at very low concentrations, even at the single molecular level in some cases. This makes it a good candidate for the development of sensing devices. However, in order to achieve best results in a reliable and consistent manner, the fabrication of large-area, periodically-arrayed, metal-coated nanoparticles is often necessary, requiring the use of expensive, time consuming processes such as e-beam lithography and/or metal deposition. In this research project, we study the use of a more commercially-amenable and rapid metal deposition technique, i.e. magnetron sputtering physical vapor deposition (MS-PVD), to produce large-area nanocompacted Ag thin films that show Raman enhancements (~ 10^6) comparable to other, more sophisticated, large-area SERS sensor fabrication techniques. Raman spectroscopy, thin film profilometry and scanning electron microscopy were used to study the effects that the variation of the different deposition parameters, such as deposition time, substrate temperature and deposition environment pressure, have on the Ag thin film morphology, structure and plasmonic enhancement factors. 

Interested Majors

All STEM Majors are Welcome!

Level of Education

Undergraduate

Graduate

Professor/Advisor

Francisco Bezares

Schedule

April 6, 2022

1:00 PM – 1:20 PM

4:00 PM – 4:20 PM

Google Meet Link

CLICK HERE TO JOIN

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